(2 pts)
Recall the generic priority queue implementation, in which
the data objects can be of any type, as long as it implements
an interface called ComparisonKey.
The main operations of the PriorityQueue class are

public void insert(ComparisonKey x);
public ComparisonKey remove();

List one advantage and one disadvantage of this approach
as compared to implementing a priority queue with integer keys.

(2 pts)
Recall the program that sorted keys of any type using
the generic priority queue:

What steps would you have to take to use sortPQ above
to sort an array of doubles?

(1 pt)
C does not have a built-in boolean data type.
But boolean expressions (expressions that are either true or
false) are required for constructs such as loops (e.g., for
statements) and conditionals (e.g., if statements).
What is the analog in C of a boolean expression and how
are truth values represented?